/* 初始化 */
* {
  margin: 0px;
  padding: 0px;
}
/* 垂直居中 */
body {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.love {
  width: 100px;
  height: 100px;
  transform: rotate(45deg);
  background-color: red;
  position: relative;
}

.love::before,
.love::after {
  content: "";
  width: 100px;
  height: 100px;
  display: inline-block;
  position: absolute;
  border-radius: 50%;
  background-color: red;
}

.love::after {
 top:0px;
 left: -50px;
}
.love::before{
  top:-50px;
  left: 0px;
}